US Patent: 256,867
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Wrench
Improved Monkey Wrench
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Patentee:
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| John Thomson (exact or similar names) - Brooklyn, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 15, 1882 |
| Granted: |
Apr. 25, 1882 |
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Patent Pictures:
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John Thomson patent April 24, 1882 |
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Stan Schulz
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Description: |
| A leaf spring behind the adjusting screw pushes the screw against matching semi-circular threads in the movable jaw. Pushing the adjusting screw in toward the wrench shanks releases the threads and allows for quick adjustment. |
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